Air Venturi odd question about magazines avenge x

New Avenge X. The gun came with 2 magazines. One is 16 rounds, the other is 10. My issue is my target zero changes when I change magazines. The 10 round mag shoots about an inch to the right compared to the 16. Any suggestions as to why this would happen?
Make sure the magazine fits into the mag well properly. Make sure it lines up with the barrel. Does the pellet probe load rounds smoothly? Make sure one of the magazines isn't damaging the pellet skirts or something
 
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